/Engine/Source/Runtime/Engine/Classes/Materials/MaterialExpressionPinBase.h
class UMaterialExpressionPinBase : public [UMaterialExpression](API\Runtime\Engine\Materials\UMaterialExpression)
TEnumAsByte< EE...
PinDirection
Direction of the pins for this base.
TArray<FCompos...
ReroutePins
Underlying reroute pins used to compile material.